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Allergology · Respiratory allergies

Mould allergies

Mould allergy occurs when people inhale the spores of microscopic fungi, which are found both indoors and outdoors. Depending on exposure, it may appear in certain seasons or all year round, and cause rhinitis, conjunctivitis or asthma.

Written by Dr A. Turcarelli, dermatologist and allergist Updated 6 January 2026 5 min read

Allergies aux moisissures

Introduction

They are often underdiagnosed and can make allergic rhinitis or allergic asthma worse.

Symptoms

  • Repeated sneezing
  • Runny or blocked nose
  • Itchy nose
  • Red, watery or itchy eyes
  • Chronic cough
  • Wheezing
  • Shortness of breath
  • Symptoms worse in damp places
  • Fatigue, poor sleep

Causes

Alternaria
Cladosporium
Aspergillus
Penicillium
Bathrooms
Cellars
Kitchens
Poorly ventilated homes
Spaces with leaks or damp

Diagnosis

  1. Detailed history (home, damp, visible mould)
  2. Link between symptoms and exposure
  3. ENT and respiratory examination
  4. Appropriate allergy tests (skin prick tests, blood tests)
  5. Assessment for associated asthma if needed

Treatments

Reducing exposure (treating damp, ventilation)
Removing visible sources of mould
Antihistamines
Nasal corticosteroids
Treatment of associated asthma if present
Lasting environmental measures
Desensitisation possible in selected cases
lasting control of symptoms

Management

Confirm the mould allergy

Identify sources in your environment

Optimise measures to clean up your home

Tailor medical treatment

Significantly improve your quality of life

Frequently asked questions

Consultation for mould allergies

Consultation with a confirmed diagnosis and a written treatment plan.

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